Synthesis of kaolin-based alkali-activated cement: carbon footprint, cost and energy assessment

Ababneh, Ayman; Matalkah, Faris; Aqel, Ruba

doi:10.1016/j.jmrt.2020.05.116

Cited by 48 publications

(15 citation statements)

References 55 publications

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“…Jordanian volcanic tuffs were classified as natural pozzolans for use in concrete production. At a 10% replacement level, the volcanic tuffs produced compressive strengths comparable to those obtained when Portland cement was used alone [9]. Moreover, the alkali-silica expansion was reduced when the replacement level increased.…”

Section: Introductionmentioning

confidence: 64%

“…Zeolite-rich tuffs, which contain a large amount of reactive SiO 2 and Al 2 O 3 , are able to increase the flexural and compressive strength of concrete blocks in the late hardening phase [8]. According to the paper of Ababneh and Matalhah [9], the quantities of volcanic tuffs available in Jordan are high and estimated at 800 million tons. The chemical composition rich in SiO 2 , Al 2 O 3 , and Fe 2 O 3 qualifies these materials as supplementary cementitious materials.…”

Section: Introductionmentioning

confidence: 99%

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The Characterization of Ukrainian Volcanic Tuffs from the Khmelnytsky Region with the Theoretical Analysis of Their Application in Construction and Environmental Technologies

et al. 2021

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(1) The mineral deposits are the base resources of materials used in building and environmental engineering applications, especially available locally. Two wells of volcanic tuff deposits in the Khmelnytsky region of Ukraine were investigated in this regard. (2) Physical-mechanical, chemical, and mineralogical analyses of the core samples were carried out. (3) The tuff samples were characterized by visible colour, low compressive strength (4.34–11.13 MPa), and high water absorption (30%). The dominant minerals of the upper horizon were chlorite, pyroxene, kaolinite, quartz, hematite, and calcite, while those of the lower horizon included analcime, quartz, hematite, and calcite. (4) The studied volcanic tuffs seem to be only partly useful for construction applications, and considering their visible colour, the exterior decoration of engineering objects could be possible. The peculiarity of the minerals of the upper horizon is that their crystals consist of Fe2+. An analysis of existing scientific data made it possible to say that these minerals can be considered as an alternative to expensive metallic iron in reducing the toxicity of chromium, uranium, and halogenated organic compounds. The significant presence of hematite allows the application of tuffs to technologies of water purification from As5+, As3+, Cr6+, Cr3+, U6+, Sb5+, and Se4+ oxyanions.

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Section: Introductionmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

The Characterization of Ukrainian Volcanic Tuffs from the Khmelnytsky Region with the Theoretical Analysis of Their Application in Construction and Environmental Technologies

et al. 2021

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“…Many concerns regarding CO2 emission, raw materials consumption and energy are incorporated with Portland cement (PC) productions [4]. Although developments in PC production technology provide a reduction in energy www.dergipark.gov.tr/tdfd consumption and harmful emissions, PC manufacturing produces approximately 0.8 tons of CO2 per ton of PC [5], [6]. These reasons have motivated researchers to study on alternative materials to substitute PC.…”

Section: Introductionmentioning

confidence: 99%

Effect of alkali modulus on the compressive strength and ultrasonic pulse velocity of alkali-activated BFS/FS cement

Dener

2022

Türk Doğa Ve Fen Dergisi

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Portland cement, which has been used as an unrivaled binder material since its development has become one of major sources of greenhouse gas emission. Compared with the conventional cement, alkali-activated materials which based on the principle of activating precursor materials by means of alkali activators have comparable engineering properties and lower CO2 emission during its production. In this study, the effect of alkali modulus on the compressive strength and ultrasonic pulse velocity of granulated blast furnace slag/ferrochrome slag-based alkali-activated cement was investigated. Alkali-activated cement was produced from the mixture of a blast furnace slag and ferrochrome slag in proportion 80% and 20% respectively. Alkali modulus of 0.8, 1.0, 1.2, 1.4 were adopted in the test. Mortar specimens with the alkali modulus of 0.8 and 1 had very low strength after 3 days, while specimens with the modulus of 1.2 and 1.4 gained approximately half of their 28-day strength in the first three days.

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“…Alkali aluminosilicates' chemistry has been recently recommended as a viable alternative option to the ordinary Portland cement (OPC) for structural applications. The new chemistry has attracted many researchers due to its remarkable such as (i) reduction of CO 2 emissions, 1 (ii) high compressive strength, 2 (iii) thermal durability, 3 and (iv) superior chemical resistance (sulfuric acid resistance). 4,5 The widely used precursors in the production of alkali-activated binders are industrial waste materials such as coal fly ash, 6 blast furnace slag, 7 and natural materials such as pozzolans 8 and kaolins.…”

Section: Introductionmentioning

confidence: 99%

Effect of fiber type and content on the mechanical properties and shrinkage characteristics of alkali‐activated kaolin

Matalkah

Ababneh

Aqel

2021

Structural Concrete

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An experimental study was carried out to evaluate the effect of several fibers on the mechanical properties, drying shrinkage, and microstructural characteristics of alkali‐activated kaolin binders. Four different types of fibers were evaluated in this study: polypropylene (PP) fiber, discontinuous structural synthetic (DSS) fiber, brass‐coated steel (BCS) fiber, and hooked steel (HS) fiber. The fibers were added to the alkali‐activated kaolin at a volume fraction of 0%, 0.5%, 1%, and 1.5%. The experimental results revealed that the compressive strength of alkali‐activated binder increased by about 60% when 1% of PP fiber is added, whereas the addition of HS fiber substantially enhanced the flexural strength (more than 200% when 1.5% fiber volume content is added). BCS and HS fibers were found to more effective compared to PP and DSS fibers in maintaining the binder integrity prior to high temperatures exposure. All fiber‐reinforced alkali‐activated composites yielded lower drying shrinkage (≤450 microstrains), where HS fiber was found to effectively prevent the shrinkage of the binder (≤60 microstrains). The microstructural investigation revealed good interfacial bonding between the alkali‐activated binder and the fibers.

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Synthesis of kaolin-based alkali-activated cement: carbon footprint, cost and energy assessment

Cited by 48 publications

References 55 publications

The Characterization of Ukrainian Volcanic Tuffs from the Khmelnytsky Region with the Theoretical Analysis of Their Application in Construction and Environmental Technologies

The Characterization of Ukrainian Volcanic Tuffs from the Khmelnytsky Region with the Theoretical Analysis of Their Application in Construction and Environmental Technologies

Effect of alkali modulus on the compressive strength and ultrasonic pulse velocity of alkali-activated BFS/FS cement

Effect of fiber type and content on the mechanical properties and shrinkage characteristics of alkali‐activated kaolin

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